A221303 as a triangular array
| | | | | | | | | 1 |
| | | | | | | | | 3 | | 3 |
| | | | | | | | 7 | | 19 | | 7 |
| | | | | | | 17 | | 137 | | 137 | | 17 |
| | | | | | 41 | | 1001 | | 2899 | | 1001 | | 41 |
| | | | | 99 | | 7305 | | 63285 | | 63285 | | 7305 | | 99 |
| | | | 239 | | 53291 | | 1388449 | | 4119299 | | 1388449 | | 53291 | | 239 |
| | | 577 | | 388741 | | 30470039 | | 270434991 | | 270434991 | | 30470039 | | 388741 | | 577 |
| | 1393 | | 2835697 | | 668597561 |
|
A221303 as a square array
1 | 3 | 7 | 17 | 41 | 99 | 239 | 577 | 1393
| 3 | 19 | 137 | 1001 | 7305 | 53291 | 388741 | 2835697
| 7 | 137 | 2899 | 63285 | 1388449 | 30470039 | 668597561
| 17 | 1001 | 63285 | 4119299 | 270434991
| 41 | 7305 | 1388449 | 270434991
| 99 | 53291 | 30470039
| 239 | 388741
| 577
|
A221303 as an upper right triangle
1 | 3 | 7 | 17 | 41 | 99 | 239 | 577 | 1393
| | 3 | 19 | 137 | 1001 | 7305 | 53291 | 388741 | 2835697
| | | 7 | 137 | 2899 | 63285 | 1388449 | 30470039 | 668597561
| | | | 17 | 1001 | 63285 | 4119299 | 270434991
| | | | | 41 | 7305 | 1388449 | 270434991
| | | | | | 99 | 53291 | 30470039
| | | | | | | 239 | 388741
| | | | | | | | 577
| | | | | | | |
|
|